[LAA] Add test case for #82665.

Test case for #82665.

llvm/test/Analysis/LoopAccessAnalysis/underlying-object-loop-varying-phi.ll

@@ -0,0 +1,175 @@
+; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 4
+; RUN: opt -passes='print<access-info>' -disable-output %s 2>&1 | FileCheck %s
+
+target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
+
+; Test case for https://github.com/llvm/llvm-project/issues/82665.
+define void @indirect_ptr_recurrences_read_write(ptr %A, ptr %B) {
+; CHECK-LABEL: 'indirect_ptr_recurrences_read_write'
+; CHECK-NEXT:    loop:
+; CHECK-NEXT:      Memory dependences are safe
+; CHECK-NEXT:      Dependences:
+; CHECK-NEXT:      Run-time memory checks:
+; CHECK-NEXT:      Grouped accesses:
+; CHECK-EMPTY:
+; CHECK-NEXT:      Non vectorizable stores to invariant address were not found in loop.
+; CHECK-NEXT:      SCEV assumptions:
+; CHECK-EMPTY:
+; CHECK-NEXT:      Expressions re-written:
+;
+entry:
+  br label %loop
+
+loop:
+  %iv = phi i64 [ 1, %entry ], [ %iv.next, %loop ]
+  %ptr.recur = phi ptr [ %A, %entry ], [ %ptr.next, %loop ]
+  %gep.B = getelementptr inbounds ptr, ptr %B, i64 %iv
+  %ptr.next = load ptr, ptr %gep.B, align 8, !tbaa !6
+  %l = load i32, ptr %ptr.recur, align 4, !tbaa !10
+  %xor = xor i32 %l, 1
+  store i32 %xor, ptr %ptr.recur, align 4, !tbaa !10
+  %iv.next = add nuw nsw i64 %iv, 1
+  %ec = icmp eq i64 %iv.next, 5
+  br i1 %ec, label %exit, label %loop
+
+exit:
+  ret void
+}
+
+define i32 @indirect_ptr_recurrences_read_only_loop(ptr %A, ptr %B) {
+; CHECK-LABEL: 'indirect_ptr_recurrences_read_only_loop'
+; CHECK-NEXT:    loop:
+; CHECK-NEXT:      Memory dependences are safe
+; CHECK-NEXT:      Dependences:
+; CHECK-NEXT:      Run-time memory checks:
+; CHECK-NEXT:      Grouped accesses:
+; CHECK-EMPTY:
+; CHECK-NEXT:      Non vectorizable stores to invariant address were not found in loop.
+; CHECK-NEXT:      SCEV assumptions:
+; CHECK-EMPTY:
+; CHECK-NEXT:      Expressions re-written:
+;
+entry:
+  br label %loop
+
+loop:
+  %iv = phi i64 [ 1, %entry ], [ %iv.next, %loop ]
+  %ptr.recur = phi ptr [ %A, %entry ], [ %ptr.next, %loop ]
+  %red = phi i32 [ 0, %entry ], [ %xor, %loop ]
+  %gep.B = getelementptr inbounds ptr, ptr %B, i64 %iv
+  %ptr.next = load ptr, ptr %gep.B, align 8, !tbaa !6
+  %l = load i32, ptr %ptr.recur, align 4, !tbaa !10
+  %xor = xor i32 %l, 1
+  %iv.next = add nuw nsw i64 %iv, 1
+  %ec = icmp eq i64 %iv.next, 5
+  br i1 %ec, label %exit, label %loop
+
+exit:
+  ret i32 %xor
+}
+
+define void @indirect_ptr_recurrences_read_write_may_alias_no_tbaa(ptr %A, ptr %B) {
+; CHECK-LABEL: 'indirect_ptr_recurrences_read_write_may_alias_no_tbaa'
+; CHECK-NEXT:    loop:
+; CHECK-NEXT:      Report: cannot identify array bounds
+; CHECK-NEXT:      Dependences:
+; CHECK-NEXT:      Run-time memory checks:
+; CHECK-NEXT:      Grouped accesses:
+; CHECK-EMPTY:
+; CHECK-NEXT:      Non vectorizable stores to invariant address were not found in loop.
+; CHECK-NEXT:      SCEV assumptions:
+; CHECK-EMPTY:
+; CHECK-NEXT:      Expressions re-written:
+;
+entry:
+  br label %loop
+
+loop:
+  %iv = phi i64 [ 1, %entry ], [ %iv.next, %loop ]
+  %ptr.recur = phi ptr [ %A, %entry ], [ %ptr.next, %loop ]
+  %gep.B = getelementptr inbounds ptr, ptr %B, i64 %iv
+  %ptr.next = load ptr, ptr %gep.B, align 8, !tbaa !6
+  %l = load i32, ptr %ptr.recur, align 4
+  %xor = xor i32 %l, 1
+  store i32 %xor, ptr %ptr.recur, align 4
+  %iv.next = add nuw nsw i64 %iv, 1
+  %ec = icmp eq i64 %iv.next, 5
+  br i1 %ec, label %exit, label %loop
+
+exit:
+  ret void
+}
+
+define void @indirect_ptr_recurrences_read_write_may_alias_different_obj(ptr %A, ptr %B, ptr %C) {
+; CHECK-LABEL: 'indirect_ptr_recurrences_read_write_may_alias_different_obj'
+; CHECK-NEXT:    loop:
+; CHECK-NEXT:      Report: cannot identify array bounds
+; CHECK-NEXT:      Dependences:
+; CHECK-NEXT:      Run-time memory checks:
+; CHECK-NEXT:      Grouped accesses:
+; CHECK-EMPTY:
+; CHECK-NEXT:      Non vectorizable stores to invariant address were not found in loop.
+; CHECK-NEXT:      SCEV assumptions:
+; CHECK-EMPTY:
+; CHECK-NEXT:      Expressions re-written:
+;
+entry:
+  br label %loop
+
+loop:
+  %iv = phi i64 [ 1, %entry ], [ %iv.next, %loop ]
+  %ptr.recur = phi ptr [ %A, %entry ], [ %ptr.next, %loop ]
+  %gep.B = getelementptr inbounds ptr, ptr %B, i64 %iv
+  %ptr.next = load ptr, ptr %gep.B, align 8, !tbaa !6
+  %l = load i32, ptr %ptr.recur, align 4
+  %xor = xor i32 %l, 1
+  %gep.C = getelementptr inbounds ptr, ptr %C, i64 %iv
+  store i32 %xor, ptr %gep.C, align 4
+  %iv.next = add nuw nsw i64 %iv, 1
+  %ec = icmp eq i64 %iv.next, 5
+  br i1 %ec, label %exit, label %loop
+
+exit:
+  ret void
+}
+
+define void @indirect_ptr_recurrences_read_write_may_noalias_different_obj(ptr %A, ptr %B, ptr noalias %C) {
+; CHECK-LABEL: 'indirect_ptr_recurrences_read_write_may_noalias_different_obj'
+; CHECK-NEXT:    loop:
+; CHECK-NEXT:      Memory dependences are safe
+; CHECK-NEXT:      Dependences:
+; CHECK-NEXT:      Run-time memory checks:
+; CHECK-NEXT:      Grouped accesses:
+; CHECK-EMPTY:
+; CHECK-NEXT:      Non vectorizable stores to invariant address were not found in loop.
+; CHECK-NEXT:      SCEV assumptions:
+; CHECK-EMPTY:
+; CHECK-NEXT:      Expressions re-written:
+;
+entry:
+  br label %loop
+
+loop:
+  %iv = phi i64 [ 1, %entry ], [ %iv.next, %loop ]
+  %ptr.recur = phi ptr [ %A, %entry ], [ %ptr.next, %loop ]
+  %gep.B = getelementptr inbounds ptr, ptr %B, i64 %iv
+  %ptr.next = load ptr, ptr %gep.B, align 8, !tbaa !6
+  %l = load i32, ptr %ptr.recur, align 4
+  %xor = xor i32 %l, 1
+  %gep.C = getelementptr inbounds ptr, ptr %C, i64 %iv
+  store i32 %xor, ptr %gep.C, align 4
+  %iv.next = add nuw nsw i64 %iv, 1
+  %ec = icmp eq i64 %iv.next, 5
+  br i1 %ec, label %exit, label %loop
+
+exit:
+  ret void
+}
+
+
+!6 = !{!7, !7, i64 0}
+!7 = !{!"any pointer", !8, i64 0}
+!8 = !{!"omnipotent char", !9, i64 0}
+!9 = !{!"Simple C/C++ TBAA"}
+!10 = !{!11, !11, i64 0}
+!11 = !{!"int", !8, i64 0}